Date: Sat, 5 Feb 2011 21:02:13 +0000 (UTC) From: Jilles Tjoelker <jilles@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r218344 - stable/8/bin/sh Message-ID: <201102052102.p15L2DZn040837@svn.freebsd.org>
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Author: jilles Date: Sat Feb 5 21:02:13 2011 New Revision: 218344 URL: http://svn.freebsd.org/changeset/base/218344 Log: MFC r216630: Explain why it is a bad idea to use aliases in scripts. Modified: stable/8/bin/sh/sh.1 Directory Properties: stable/8/bin/sh/ (props changed) Modified: stable/8/bin/sh/sh.1 ============================================================================== --- stable/8/bin/sh/sh.1 Sat Feb 5 21:00:35 2011 (r218343) +++ stable/8/bin/sh/sh.1 Sat Feb 5 21:02:13 2011 (r218344) @@ -462,9 +462,10 @@ would become Aliases provide a convenient way for naive users to create shorthands for commands without having to learn how to create functions with arguments. -They can also be -used to create lexically obscure code. -This use is discouraged. +Using aliases in scripts is discouraged +because the command that defines them must be executed +before the code that uses them is parsed. +This is fragile and not portable. .Pp An alias name may be escaped in a command line, so that it is not replaced by its alias value, by using quoting characters within or
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